Cable for comparatively deep seas



Jan.3,19 3. G ZAP.; 1,893,119

CABLE FOR COMPARATIVELY DEEP SEAS Filed Sept. 12, 1928 7N veN To Fg 'Patented Jan. a, 1933 UNITED STATES PATENT oFFlcE GEORG ZAPF, 0F BIEHLEBWYALL, COLOGNE, EBIANY, ASSIGNOB T0 FELTEN' GUILLEAUHE CABLBWEBK Amm-GESELLSCHAFT, 0I. OOIIOGNE-IULHEIM, GEB

HANY

CABLE FOB OHPAMTIVELY Dm SEAS Application led september 18, 1828, Serial NorSOMl, and in Germany September 16, 1927.

The invention relates to a cable for comparatively deep seas having a pressure rotecting covering underneath the lea or gutta-percha covering, which protecting covering consists of profile wires formed of aluminum and the object of the invention is,A

to im rove the pressure protecting covering by ma 'ng it perfectly water-tight.'

In the case of pressures of a few hundred atms. as they occur in deep seas, the profile wires of the pressure-protecting covering are so strongly compressed that most of the gaps between the profile wires close. However, the remaining gaps are suiiicient under the high pressures to allow the water to penetrate into the interior of the cable when the lead sheathing is damaged. In order to make also the pressure protecting covering perfectly water-tight according to the present invention, the pressure protecting covering consists of a tube of profile wires known per se, in which wires of circular cross-section are inserted between each two .profile wires in semi-circular recesses of the profile wires. According to the invention, the wires of circular cross-section consist of steel wires orwires of anothermaterialhaving a hightensile stren h, each wire being surrounded by a thin lea coverin At the pressures existing in deep seas, t e lead is compressed into the gaps-which remain between the profile wires,- whereby the pressure protecting tube becomes perfectly water-tight.. This construction enables -a very thin lead covering to be used over the pressure protecting covering instead of a thick or sometimes double lead sheathing, which thin lead covering need rotect the cable onlybefore and during the a ing of the cable against the penetration .o moisture and water.

It is essential in structures of this kind a telephone cable containing four quads. The lightmetal -wires A of the pressure protectlng covering are of trapezoidal cross-section and are provided with recesses in which the steel wires'B are inserted. The steel wires 55 are surrounded by lead coverings C. A thin layer D of a material impermeable to water, for instance gutta percha, is provided around the pressure protecting covering.- Two lead sheathings E and F may surround the layer 60 D and theyfin their turn may be surrounded by the usual armouring and bolster) What I claim is:

1. A cable for comparatively deep seas having a pressure protecting covering constituted by aluminium prole wires or profile strips having their sides artly in intimate contact and partly formedJ with recesses lying opposite each other, steel wires of a specially high tensile strength inserted in the said recesses formed in the sides 0f the profile wires or profile strips of the pressure protecting coverlng and a lead covering surrounding each ofthe steel wires.

2. A cable for comparatively deep seas hav- '75 ing a pressure protecting' covering consisting of a plurality of circularly aligned alummium profile strips having their sides partly in intimate engagement and inclined to prevent relative movement when subjected to ressure and partly formed with recesses lymg o posite each other, steel wires off a specia l y high tensile strength confined in the said recesses formed in the sides of the rofile strips and a lead covering surroun ing s each of the steel wires.

In testimony whereof I have signed my that the wires orstrips A be of a cross secv tion other than round or square, therefore the term profile has been applied thereto. These elements must be of such form that their sides intimately contact to e'ectively encase the wires B.

The accompanying drawing illustrates by way of example one form of construction according to the invention in connection with name to this specification.

GEORG ZAPF. no 

